Original Engine Management IS78 Ignition Switch Ignition Switches match OE form, fit, function and utilize corrosion resistant housings and are manufactured with O.E. type materials to ensure optimum performance and extended service life. Our switches are designed using copper alloy conductors to ensure superior electrical conductivity with low resistive losses. Our parts are 100% tested to verify both mechanical and electrical switching performance. Sturdy nylon-composite housing Brass or copper terminals for superior conductivity